Geometry Calculators


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Plane Geometry Calculators


ANGLES, CIRCLES, ELLIPSES

Angle Conversion

Angles In Circles   Tutorial for calculating angles in circles formed from radii, chords, tangents and secants.

Central Angle Calculator   Calculates a Circle's Central Angle, Radius or Arc Length

Circle Circumference & Area Calculator

CIRCLE Calculator   for Radius, Central Angle, Chord, Segment Height, Apothem, Arc Length and Chord Length. If you know two, it will calculate the other five as well as the Sector Area, Segment Area and Circle Area.

Circle Equation Tutorial
Explains equations of the type x² + y² = r²

Circle Equation Calculator
Input 3 points and it calculates a circle's center radius and equation.

Ellipses   Calculator and tutorial

TRIANGLE CALCULATORS

Types of Triangles   A chart showing triangles classified by angles (acute, right, obtuse) and by sides (equilateral, isosceles, scalene).
Also has triangle area formulas and a triangle area calculator.

Triangle Centers   A tutorial discussing the incenter, circumcenter, centroid, orthocenter and the Euler line.

Triangle Tester   Calculates if 3 sides will form a triangle or not.

Triangle Tester   Input 3 triangle side lengths and this calculates if the sides will form an equilateral, isosceles, acute, right or obtuse triangle.

Right Triangles (Pythagorean Theorem)

30 60 90 and 45 45 90 Triangle Calculator

QUADRILATERAL CALCULATORS

Quadrilateral page   Descriptions and graphics discussing 6 different types of quadrilaterals.

Calculator for Squares and Rectangles

Rhombus Calculator   Input side length and either angle and it calculates the area, both diagonals, altitude, perimeter.
  Input both diagonals and it calculates the side, area, altitude, perimeter and both angles.

Calculator for Parallelograms   Input two parallelogram sides and one angle and it calculates the area, both diagonals, altitude, perimeter and the angle of intersection of the diagonals.
  Input both diagonals and diagonal intersection angle and it calculates area, both sides, altitude, height, perimeter and both angles.

Quadrilateral Kite Calculator

Trapezoid Calculator
        How to Calculate Trapezoid Area

POLYGON CALCULATORS

Regular Polygon Calculator   Input the number of sides and the side length and it calculates the polygon perimeter, all angles (interior, central and exterior), the inradius, the circumradius and the total area.

Calculator for Constructing Regular Polygons
Draw a circle, measure the radius and this calculates the length of the polygon's sides.




Solid Geometry Calculators


Area and Volume Calculator for a Sphere or Cylinder

Spherical Tank

Spherical Cap

Cube Area and Volume

Triangular Prism Calculator - Input the 3 triangle sides, the height and it calculates the total area and volume.

Rectangular Solid (Rectangular Prism) - Calculates Area and Volume

Rectangular Tank   with Dipstick Calculator

Horizontal Cylindrical Tank   with Dipstick Calculator

Vertical Cylindrical Tank   with Dipstick Calculator

Torus Calculator - Calculates Volume and Area

The 5 Platonic Solids (Regular Polyhedra) Calculator - Information about the Tetrahedron, Hexahedron (Cube), Octahedron, Dodecahedron, Icosahedron and calculator.

Cones & Frustums

Right Regular Prisms

Right Regular Pyramids

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